Content for TR 37.824 Word version: 16.0.0

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1 Scope p. 5

The present document is a technical report for the work item on additional enhancements for NB-IoT, covering the study on the coexistence of NB-IoT with NR, which is one of the objectives of the WI [2].

2 References p. 5

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.

References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.

[1]

TR 21.905: "Vocabulary for 3GPP Specifications".

[2]

RP-193224: "Additional enhancements for NB-IoT"

[3]

TS 36.104: "Evolved Universal Terrestrial Radio Access (E-UTRA); Base Station (BS) radio transmission and reception".

[4]

TS 36.101: "Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio transmission and reception".

[5]

TS 38.213: "NR; Physical layer procedures for control".

[6]

TS 38.104: "NR: Base Station (BS) radio transmission and reception".

[7]

TS 36.141: " Evolved Universal Terrestrial Radio Access (E-UTRA); Base Station (BS) conformance testing".

[8]

TS 37.141: "NR, E-UTRA, UTRA and GSM/EDGE; Multi-Standard Radio (MSR) Base Station (BS) conformance testing".

3 Definitions, symbols and abbreviations p. 5

3.1 Definitions p. 5

For the purposes of the present document, the terms and definitions given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.

3.2 Symbols p. 5

For the purposes of the present document, the following symbols apply:

3.3 Abbreviations p. 6

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.

4 Background p. 7

4.1 Task description p. 7

The objective on NR and NB-IoT coexistence is,

Specify NB-IoT resource reservation for UL/DL FDD/TDD NB-IoT non-anchor carriers, to avoid resource overlap between NR and NB-IoT when NB-IoT is deployed within an NR carrier [RAN1, RAN2, RAN4].
For NB-IoT in-band, guard band and standalone operation co-existence with NR, including the case of NR configured in 15kHz SS Block SCS and the case of 30kHz SS Block SCS as specified in 38.101-1, investigate the following: [RAN4]
- 15KHz, 30KHz, and 60KHz numerologies for NR FR1 concerned bands, with higher priority given first to 15kHz and then to 30kHz
- Channel raster, PRB and subcarrier grid alignment between NB-IoT and NR
- Study feasible NB-IoT carrier(s) placement allocation without RF backward compatibility impact and compatible with Rel'13 NB-IoT and Rel'15 NR, to operate simultaneously within various NR channel bandwidths
- Study if the +6dB downlink RE power boosting can still be allowed for both in-band and guard band operation modes when co-existing with NR
- Synchronization issue between NR and NB-IoT, including timing advance
- Frequency band support in NB-IoT and NR
- Testability applicable to RF
- Coexistence between R15 NR and R13/R14/R15 NB-IoT.